 /*
 *Copyright (c) 2013-2013, yinqiwen <yinqiwen@gmail.com>
 *All rights reserved.
 * 
 *Redistribution and use in source and binary forms, with or without
 *modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of Redis nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 *THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 
 *BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
 *THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "channel/all_includes.hpp"

using namespace ardb::codec;

//static void DestoryByteBuffer(ByteBuffer* obj)
//{
//	ChannelBufferPool::Release(obj);
//}

bool IntegerHeaderFrameDecoder::Decode(ChannelHandlerContext& ctx, Channel* channel,
        Buffer& buffer, Buffer& msg)
{
	if (buffer.ReadableBytes() < 4)
	{
		return false;
	}
	size_t read_idx = buffer.GetReadIndex();
	uint32 len;
	buffer.Read(&len, sizeof(len));
	if(m_header_network_order)
	{
	    len = ntohl(len);
	}
	if (buffer.ReadableBytes() < (len - sizeof(len)))
	{
		buffer.SetReadIndex(read_idx);
		return false;
	}
	if(!m_remove_len_header)
	{
		msg.Write(&len, sizeof(uint32));
	}
	msg.EnsureWritableBytes(m_header_calc_in_length?len - sizeof(len):len);
	msg.Write(&buffer, m_header_calc_in_length?len - sizeof(len):len);
	//FrameDecodeResult<Buffer> result(msgbuf, StandardDestructor<Buffer>);
	return true;
}
